Patent GB-419288-A (GB)
Title: Improvements in door locks
IPC: E05B55/04
Filed: 1933-04-28
Abstract: 419,288. Locks and latches. RENEVEY, E. A., 5, Rue du Chablais, Annemasse, Haute-Savoie, France. April 28, 1933, No. 12436. Convention date, March 4. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 3, 1933.] [Class 44.] A spring-pressed sliding latch 1 is retracted by a pivoted arm 9 operated by clockwise movement of a follower 6 having a pin 7 and slot 8 connection theretherewith. Counterclockwise movement of the follower 6 lifts a sliding bolt 11 to the full-line position so that its head 14 engages with a notch 15 in the latch 1 to block it, the bolt 11 being held raised by spring- pressed pivoted tumblers 16, 17 engaging under the lower edge of an extension 23 of it. The bolt 11 engages at 121 behind a pin 13 on the arm 9 to block the latter and a spring-pressed pivoted pawl 27 carried by the bolt 11 engages with the follower 6 to prevent its counterclockwise movement. The tumblers 16, 17 are disengaged from outside by a key 25 which is pressed in until a lug 20 on the tumbler 17 engages with the rear wall 24 of the casing, and from inside by a pull rod 29 acting similarly. The Specification as open to inspection under Sect. 91 comprises also modifications of the above lock and various other locks. In one modification, the key 25 instead of engaging directly with the tumblers 16, 17 engages with intermediate members slidable in the key tube 26. A master key, Fig. 16 (Cancelled), may be used to operate a number of locks having one intermediate member of common length and the others of varying lengths. A shoulder 33 co-operates with the one intermediate member and tongues 34 pass between the other intermediate members to engage directly with the tumblers. In another modification, the tumblers are rocked by a rotatable key engaging with their edges. Figs. 17 (Cancelled) and 18 (Cancelled) show a master key 83 fitting over three of the tumblers 78 and co-operating with projections 88 thereon and with the edge of the fourth tumbler 79. Figs. 1 (Cancelled) and 4 (Cancelled) show a lock in which a spring- retracted lock bolt 1 and a spring-shot latch bolt 2 are operated by a two-armed follower. When the operating handle 3 is turned one way, an arm 7 engages with a pin 9 to withdraw the latch bolt 2, and when it is turned the other way, an arm 6 engages with a pin 8 to shoot the lock bolt 1. The lock bolt is held shot by spring-pressed pivoted tumblers 10 which engage with a recess 1<a> in the bolt tail and are adapted to be disengaged from outside by a key and from inside by a key or a pull rod. The tumblers may be provided with intermediate members 21, Fig. 4 (Cancelled), which may be permanently fixed to the tumblers or separate therefrom so that they can be changed to alter the lock. A single two-armed spring is provided for the two bolts 1, 2. In a modification, Fig. 5 (Cancelled), the lock bolt 1 is held in both its extreme positions by spring-pressed levers 26. When the handle 23 is turned to shoot the bolt, an arm 35 on the spindle 4 co-operates with tails 34 on the levers 26 to raise them and the follower arm 25 then engages the pin 8. The bolt is withdrawn by a key which engages gatings 38 therein and requires two turns. To prevent picking of the lock by turning the handle to raise the levers and then engaging a wire with the gatings 38, a spring strip 39 is provided on the bolt to block the arm 35 when the bolt is shot. Fig. 10 (Cancelled) shows a lock bolt 1 held shot or retracted by a follower arm 47 slidable but non-rotatable on a spindle 46 which is an extension of the barrel of a pintumbler lock. The bolt is shot by a handle follower 41 engaging with a pin 42, after an inclined face on the follower 41 has engaged with the end face of the arm 47 to depress it against a spring so as to disengage it from the bolt. The bolt is withdrawn in the usual manner by the lock follower 47. This subjectmatter does not appear in the Specification as accepted.